Super Saiyan said:1. I think Goku @ Chappa is already above Yamcha/Krillin level. They were in absolute shock by his performance and even Roshi said "this could be bad for me" or something to that extent.
2. I also think you have Battle Level Goku too weak. Tenshinhan was laying a beating on Tournament Level Goku, and then Goku was able to stomp that Tenshinhan with his Battle Level. The power up should be 1.2x or greater.